Edible substances evoke the secretion of thick, concentrated saliva. Why? The answer, obviously, is that this enables the mass of food to pass smoothly through the tube leading from the mouth into the stomach.
-- Ivan Pavlov
   
Ivan Pavlov   Name:
Ivan Pavlov
Type:
Psychologist
Nationality:
Russian
Birth:
September 14, 1849
Death:
February 27, 1936
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